package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增分类
     * @param categoryDTO
     */
    @Override
    public void insertCategory(CategoryDTO categoryDTO) {
        Category category = new Category();
        //将categoryDTO赋值到category中
        BeanUtils.copyProperties(categoryDTO,category);
        //设置分类的状态，0为禁用，1为启用
        category.setStatus(StatusConstant.DISABLE);
       /* //设置创建时间，修改时间，创建人，修改人
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());
        category.setUpdateTime(LocalDateTime.now());
        category.setCreateTime(LocalDateTime.now());*/
        categoryMapper.insert(category);
    }

    /**
     * 分类管理的分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult categoryPage(CategoryPageQueryDTO categoryPageQueryDTO) {
        //使用PageHelper来分页查询
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);

        long total = page.getTotal();
        List<Category> result = page.getResult();

        return new PageResult(total,result) ;
    }

    /**
     * 根据类型查询
     * @param type
     * @return
     */
    @Override
    public List<Category> queryByType(String type) {
        return categoryMapper.queryByType(type);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    @Override
    public void updateCategory(CategoryDTO categoryDTO) {
        Category category = new Category();

        BeanUtils.copyProperties(categoryDTO,category);

        /*category.setUpdateTime(LocalDateTime.now());

        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.update(category);
    }

    /**
     * 启用或禁用
     * @param status
     * @param id
     */
    @Override
    public void enableOrDisable(Integer status,Long id) {
        Category category = new Category();

        /*category.setUpdateTime(LocalDateTime.now());

        category.setUpdateUser(BaseContext.getCurrentId());*/

        category.setStatus(Integer.valueOf(status));

        category.setId(id);

        categoryMapper.update(category);
    }

    /**
     * 通过id删除分类
     * @param id
     */
    @Override
    public void deleteCategoryById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteCategoryById(id);
    }
}
